Triangle XYZ is isosceles. Angle Y measures a°.




If triangle RST is an acute triangle, then m∠S must be
The lengths of the sides of triangle XYZ are written in terms of the variable m, where m ≥ 6.





2 horizontal and parallel lines are intersected by 2 diagonal lines to form a triangle with exterior angles. The top angle of the triangle is (2 x + 10) degrees. The bottom right angle of the triangle is 79 degrees. The exterior angle to the bottom left angle is (6 x + 1) degrees.

Triangle K M L is shown. Line L K extends through point J to form exterior angle J K M.

Triangles D E F and G H J are congruent. Triangle D E F is shifted down and to the right to form triangle G H J.

Nigel and Mia are searching for a treasure chest under water. The straight line distance between them is 100 meters.

Triangles J K L and M N R are shown.

Triangles A B C and Q R S are shown. Sides A B and Q R are congruent. Angles C A B and R Q S are congruent. Angles Q S R and A C B are congruent.

Triangles H J K and L M N are shown. The triangles have identical side lengths and angle measures. Triangle H J K is slightly lower and to the left of triangle L M N. Triangle H J K is reflected to form triangle L M N.

Triangle KNM is shown.


The proof that MNG ≅ KJG is shown.Given: N and J are right angles; NG ≅ JGProve: MNG ≅ KJG

If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true?
Triangle A B C is shown. Lines are drawn from each point to the opposite side and intersect at point D. They form line segments A G, B E, and C F.

Which congruence theorem can be used to prove △WXS ≅ △YZS?

Given: bisects ∠MRQ; ∠RMS ≅ ∠RQS

In which figure is point G a centroid?




Triangles J K L and X Y Z are shown. Angles K J L and Y X Z are right angles. The length of Y X is 10. The length of hypotenuse K L is 10.

Triangle JKL is isosceles. The measure of angle J is 72° and the measure of angle K is 36°. Which statement describes angle L?
The proof that ΔQPT ≅ ΔQRT is shown.Given: SP ≅ SRProve: ΔQPT ≅ ΔQRT

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